Twin Zygosity Testing in Allentown

Clear Answers Through a Simple Cheek Swab

Twin Zygosity Testing determines whether twins are monozygotic, commonly called identical, or dizygotic, commonly called fraternal. Instead of relying on resemblance, placental information, or recollections from pregnancy, the test directly compares the twins’ genetic profiles.

At Fastest Labs of Lehigh Valley, we collect a DNA sample from each twin using a simple cheek swab. Our certified collectors provide confidential service in a clean, comfortable Allentown facility. We can arrange testing for personal knowledge or follow documented procedures when results are intended for official use.

Call (610) 947-4195 to discuss your reason for testing and arrange Twin Zygosity Testing in Allentown.

Comfortable DNA Sample Collection in Allentown

We bring more than a decade of industry experience to DNA sample collection. Our Allentown location accepts walk-ins and appointments, and we aim to keep wait times under five minutes. We also welcome families from Bethlehem, Easton, and surrounding Lehigh Valley communities. The facilities we partner with are accredited by AABB for DNA testing and processing.

Personal-Information Testing vs. Official Testing

The correct process depends on who needs the results and how they’ll be used. Tell us the intended purpose before collection so we can explain the options and help you select the appropriate one.

Personal-Information Testing
This option is intended for private knowledge, such as resolving a long-standing family question or updating family records. Results from a personal testing process may not satisfy the requirements of a court, government agency, or other organization.

Official-Use Testing
An organization may require identity verification, impartial collection, specific paperwork, and chain of custody. Chain of custody creates a documented record of how samples were identified, collected, handled, and transferred for processing.

If another party requested the test, ask the recipient about its requirements before your visit. Confirming those details in advance can prevent you from choosing a process that doesn’t fit the stated purpose.

Hear From Our Customers

“Friendly staff, easy to work with, will be sending all of our employees to them!”

- Mike F.

How Twin DNA Testing Works

We first confirm why the results are needed and which collection procedure applies. The requirements may differ depending on whether the test is for private information or official use.

The testing process generally includes:

Test Selection: We discuss whether the results are for personal information, medical-related needs, or an organization’s documentation requirements.
Participant Identification: Our collectors follow the identification and documentation steps required for the selected process.
Cheek-Swab Collection: We use a buccal swab, a non-invasive method that collects cells from inside each twin’s cheek.
Laboratory Processing: A partner facility accredited by AABB compares genetic markers from both samples.
Result Reporting: The report states whether the genetic profiles support monozygotic or dizygotic status.

Visit length and laboratory turnaround depend on the selected test and its processing requirements. Before collection, we can explain expected timing, participant requirements, and pricing.

Why Families Request a Zygosity DNA Test

Appearance alone doesn’t always provide a conclusive answer about whether twins are identical or fraternal. Pregnancy details may also be incomplete or difficult to interpret years later.

Families may request testing for:

Personal curiosity about whether twins are identical or fraternal
Clarification when family recollections or pregnancy information don’t resolve the question
Accurate information for family records
Medical-related discussions with a qualified healthcare professional
Documentation requested by a court, government agency, or other organization

Zygosity findings don’t provide a medical diagnosis. If the information may affect medical care, ask a qualified healthcare professional to explain its relevance.

What Twin Zygosity Testing Can Determine

This test answers one specific question: whether two twins are genetically identical or fraternal. Monozygotic twins develop when one fertilized egg splits, while dizygotic twins develop from two separately fertilized eggs.

Twin Zygosity Testing is distinct from paternity, maternity, sibling, ancestry, and DNA profiling services. It isn’t designed to establish parentage, trace ancestry, diagnose a health condition, or replace advice from a qualified healthcare professional.

We use facilities accredited by AABB to conduct DNA testing, including legal chain-of-custody testing when documented collection and handling are required.

Choose the Right Twin Testing Process

We can help you select a testing option based on how you plan to use the results. Before collection, our team can explain the process, participant requirements, expected timing, and pricing. We handle your DNA testing information confidentially throughout the process.

Call (610) 947-4195 to speak with Fastest Labs of Lehigh Valley and arrange your cheek-swab collection.

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